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zipcodestack
Free & Reliable Zip Code API for Global Postal Code Search & Validation

What is zipcodestack?

Zipcodestack is a comprehensive zip code REST API that offers real-time validation and information about postal codes across 210+ countries. It serves as an efficient data layer for businesses to validate addresses, ensure accurate shipping calculations, and gather location data. The platform provides multiple endpoints for global searches and postal code-related calculations, with all data updated regularly from official postal services and government databases.

The API features lightning-fast response times under 100ms and includes a generous free tier with 300 requests per month, making it accessible for startups, personal projects, and testing. For higher volumes, affordable paid plans are available with additional features like priority support, team management, and custom validations. Integration is straightforward with comprehensive documentation and examples in multiple programming languages.

Features

  • Worldwide Data Coverage: Access postal code data for 210+ countries with regular updates
  • Free Tier: 300 free requests per month with 10 requests per minute rate limit
  • Multiple Endpoints: Search postal codes globally and calculate distances between zip codes
  • Easy Integration: REST API with comprehensive documentation and examples in multiple programming languages
  • High Performance: Lightning-fast response times under 100ms with 99.99% uptime

Use Cases

  • E-commerce address validation during checkout
  • Logistics and shipping calculations
  • Global address verification systems
  • Location-based service applications
  • Startup proof-of-concept development
  • International marketplace operations

FAQs

  • What is the uptime guarantee for the API?
    The API maintains 99.99% uptime, with current status available on the Status Page.
  • Where does the postal code data come from?
    Data is sourced from multiple providers including official postal services and government databases.
  • What happens if I need more than the maximum paid plan offers?
    Custom plans are available by contacting the team directly for tailored solutions.
  • Can I cancel my subscription easily?
    Yes, subscriptions can be cancelled in less than 30 seconds from the user dashboard.

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